PET/CT Scan

What is PET/CT?

PET stands for Positron Emission Technology. PET uses a radioactive type of sugar to produce pictures of the function and metabolism of cells in the body. The CT scan, on the other hand, uses X-rays to make a 3-D image of the structure and anatomy of the body.

To help physicians make a more accurate diagnosis, the PET/CT combines both a picture of function (PET), a picture of anatomy (CT) to produce a merged picture.

What to Expect During a PET/CT Scan

The length of the exam is determined by your height and area of interest. Most PET/CT scans are completed within 20 to 40 minutes.

Before the scan, you will be injected with a radioactive tracer.

You will then rest for approximately thirty to forty-five minutes while the radioactive compound distributes throughout your body, and is processed by the organs being evaluated.

You will lie on the scanner table, and slowly pass through the scanner.

The CT portion of the exam is completed first, followed by the PET portion.

You may be asked to hold your breath for several seconds while the CT scan is performed.

It is important that you don’t move for the duration of the scan.

Preparing for a PET/CT Scan

Consult your physician prior if you are pregnant, diabetic, unsure about medications or if you’ve had recent radiation therapy.

Depending on the type of study you may be asked not to eat or drink anything four to six hours before the exam.

If you are a diabetic, please notify us when scheduling your PET exam.

Take prescribed medication on the day of the exam unless instructed otherwise.